Textbook Problem

Integrated Concepts

In a laboratory experiment designed to duplicate Thomson's determination of $q_e/m_e$, a beam of electrons having a velocity of $6.00\times {10}^7\text{m}/\text{s}$ enters a

$5.00\times {10}^{-3}\text{T}$ magnetic field. The beam moves perpendicular to the field in a path having a 6.80-cm radius of curvature. Determine $q_e/m_e$ from these observations, and compare the result with the known value.